Mercedes-Benz 350SDL Pressure Test Radiator Cap at your home or office.

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Pressure Test Radiator Cap Service

How much does a Pressure Test Radiator Cap cost?

On average, the cost for a Mercedes-Benz 350SDL Pressure Test Radiator Cap is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1990 Mercedes-Benz 350SDLL6-3.4L Turbo DieselService typePressure Test Radiator CapEstimate$114.99Shop/Dealer Price$132.49 - $145.62
1991 Mercedes-Benz 350SDLL6-3.4L Turbo DieselService typePressure Test Radiator CapEstimate$94.99Shop/Dealer Price$112.52 - $125.67
Show example Mercedes-Benz 350SDL Pressure Test Radiator Cap prices

What is the radiator cap pressure test all about?

In a pressurized cooling system like those found on all cars, your car’s radiator cap is calibrated to seal in coolant to a particular pressure point, then allow some vapor to escape once that threshold has been reached. The ejected fluid is piped into the overflow bottle you might have seen in the engine bay. Then, as the engine cools, the coolant level may drop inside radiator. When that happens, a reverse-flow valve in the radiator cap opens to allow fluid from the bottle to return to the radiator. A radiator cap that isn’t working properly may cause too much fluid to escape the system.

Keep in mind:

  • A radiator cap pressure test is quick and simple, and replacement radiator caps are inexpensive.
  • Leaving a defective radiator cap in place can cause damage to the engine.

How it's done:

  • The vehicle engine is cooled before the radiator cap can be removed
  • The radiator pressure is relieved and the cap is removed
  • The radiator cap is pressure tested to specifications
  • The radiator cap is replaced and/or reinstalled to the radiator
  • The vehicle is verified to confirm problem is fixed

Our recommendation:

If your car’s engine overheats, or the overflow bottle seems overly full, have the radiator (and radiator cap) pressure tested.

What are the common symptoms indicating you need to pressure test the radiator cap?

  • Car overheats
  • Car’s overflow bottle fills up

How important is this service?

Not having this safety valve on the car’s cooling system operate properly can over- or under-pressurize the system, leading to damage to hoses, the radiator, and even the car’s cylinder head.

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Melvin

17 years of experience
221 reviews
Melvin
17 years of experience
Mercedes-Benz C300 V6-3.0L - Oil Change - Lawrenceville, Georgia
This review is about the customer service at YourMechanic which is absolutely TERRIBLE (not Melvin). If the owners and investors in this business new Alex was offering such poor customer service, their heads would be spinning. I don't even know where to start. 1) The Groupon price was not matching up with the price on their website. It was still charging me $43. I called them, no one picked up. No one EVER picks up. They have to call you back. So Alex calls me and reduces the price by $20 - and says the remaining extra $23 is because my car uses extra oil. I never pay extra for this at other shops, but I end up paying 50% more for the extra oil here. Whatever, I guess I can live with that. 2) The mechanic calls me at 2pm and says he is waiting on an oil truck or something. My appointment is at 3pm. I don't hear from him. I call him at 4pm, no answer, I leave a voicemail. I call him again 20 minutes later, he picks up. Says he might be able to come out by 6pm. I call YourMechanic, of course, no answer. Alex calls me back and says this is out of his control. The mechanic finally shows up at 5:52pm. Nearly 3 hours alter. My whole day was wasted scheduling and waiting around. 3) I now find out that the tire rotation can't be done because he doesn't have the proper equipment. Alex calls me back. I coordinate giving my phone to the mechanic so he can explain what happened to Alex. For all of this pain and suffering, Alex offered me... Wait for it... A $5 discount! I paid $23 extra for the oil. I didn't get the tire rotation (worth $20). And the mechanic showed up 3 hours late. This is a terrible service with the worst customer support (YES, YOU ALEX) - Do Not Use Them! CC: Art Agrawal, Y Combinator, SV Angel, Yuri Milner, Andreessen Horowitz, Launch Capital, SoftTech VC, CrunchFund and Ashton Kutcher.

Patrick

33 years of experience
1419 reviews
Patrick
33 years of experience
Mercedes-Benz GLC300 L4-2.0L Turbo - Oil Change - Austin, Texas
I've used Patrick for several years. He's very knowledgeable and professional. We use him for a Ford and Mercedes and he's saved us quite a bit by not having to take our vehicles to a dealership. Also, the convenience of coming to your home/place of work to complete the maintenance is priceless.

Roger

15 years of experience
55 reviews
Roger
15 years of experience
Mercedes-Benz ML320 V6-3.2L - Other Inspections - Austin, Texas
Roger is really great. Thanks for all your help!

Victor

11 years of experience
211 reviews
Victor
11 years of experience
Mercedes-Benz 450SL V8-4.5L - Starter - Virginia Beach, Virginia
Victor did a great job installing a starter on my 74 Mercedes 450SL and installing a transmission filter. Very thorough and didn't charge me for unnecessary parts. Will hire again.

Excellent Rating

(5,576)

Rating Summary
5,188
189
54
28
117
5,188
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54
28
117
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